ark1668ed-bsp/linux/Documentation/devicetree/bindings/mtd/marvell,nand-controller.yaml

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/mtd/marvell,nand-controller.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Marvell NAND Flash Controller (NFC)

maintainers:
  - Miquel Raynal <miquel.raynal@bootlin.com>

properties:
  compatible:
    oneOf:
      - items:
          - const: marvell,armada-8k-nand-controller
          - const: marvell,armada370-nand-controller
      - enum:
          - marvell,ac5-nand-controller
          - marvell,armada370-nand-controller
          - marvell,pxa3xx-nand-controller
      - description: legacy bindings
        deprecated: true
        enum:
          - marvell,armada-8k-nand
          - marvell,armada370-nand
          - marvell,pxa3xx-nand

  reg:
    maxItems: 1

  interrupts:
    maxItems: 1

  clocks:
    description:
      Shall reference the NAND controller clocks, the second one is
      is only needed for the Armada 7K/8K SoCs
    minItems: 1
    maxItems: 2

  clock-names:
    minItems: 1
    items:
      - const: core
      - const: reg

  dmas:
    maxItems: 1

  dma-names:
    items:
      - const: data

  marvell,system-controller:
    $ref: /schemas/types.yaml#/definitions/phandle
    description: Syscon node that handles NAND controller related registers

patternProperties:
  "^nand@[a-f0-9]$":
    type: object
    $ref: raw-nand-chip.yaml

    properties:
      reg:
        minimum: 0
        maximum: 3

      nand-rb:
        items:
          - minimum: 0
            maximum: 1

      nand-ecc-step-size:
        const: 512

      nand-ecc-strength:
        enum: [1, 4, 8, 12, 16]

      nand-ecc-mode:
        const: hw

      marvell,nand-keep-config:
        $ref: /schemas/types.yaml#/definitions/flag
        description:
          Orders the driver not to take the timings from the core and
          leaving them completely untouched. Bootloader timings will then
          be used.

      marvell,nand-enable-arbiter:
        $ref: /schemas/types.yaml#/definitions/flag
        description:
          To enable the arbiter, all boards blindly used it,
          this bit was set by the bootloader for many boards and even if
          it is marked reserved in several datasheets, it might be needed to set
          it (otherwise it is harmless).
        deprecated: true

    required:
      - reg
      - nand-rb

    unevaluatedProperties: false

required:
  - compatible
  - reg
  - interrupts
  - clocks

allOf:
  - $ref: nand-controller.yaml#

  - if:
      properties:
        compatible:
          contains:
            const: marvell,pxa3xx-nand-controller
    then:
      required:
        - dmas
        - dma-names

  - if:
      properties:
        compatible:
          contains:
            const: marvell,armada-8k-nand-controller
    then:
      properties:
        clocks:
          minItems: 2

        clock-names:
          minItems: 2

      required:
        - marvell,system-controller

    else:
      properties:
        clocks:
          minItems: 1

        clock-names:
          minItems: 1


unevaluatedProperties: false

examples:
  - |
    #include <dt-bindings/interrupt-controller/arm-gic.h>
    nand_controller: nand-controller@d0000 {
        compatible = "marvell,armada370-nand-controller";
        reg = <0xd0000 0x54>;
        #address-cells = <1>;
        #size-cells = <0>;
        interrupts = <GIC_SPI 84 IRQ_TYPE_LEVEL_HIGH>;
        clocks = <&coredivclk 0>;

        nand@0 {
            reg = <0>;
            label = "main-storage";
            nand-rb = <0>;
            nand-ecc-mode = "hw";
            marvell,nand-keep-config;
            nand-on-flash-bbt;
            nand-ecc-strength = <4>;
            nand-ecc-step-size = <512>;

            partitions {
                compatible = "fixed-partitions";
                #address-cells = <1>;
                #size-cells = <1>;

                partition@0 {
                    label = "Rootfs";
                    reg = <0x00000000 0x40000000>;
                };
            };
        };
    };

  - |
    cp0_nand_controller: nand-controller@720000 {
        compatible = "marvell,armada-8k-nand-controller",
                "marvell,armada370-nand-controller";
        reg = <0x720000 0x54>;
        #address-cells = <1>;
        #size-cells = <0>;
        interrupts = <115 IRQ_TYPE_LEVEL_HIGH>;
        clock-names = "core", "reg";
        clocks = <&cp0_clk 1 2>,
                 <&cp0_clk 1 17>;
        marvell,system-controller = <&cp0_syscon0>;

        nand@0 {
            reg = <0>;
            label = "main-storage";
            nand-rb = <0>;
            nand-ecc-mode = "hw";
            nand-ecc-strength = <8>;
            nand-ecc-step-size = <512>;
        };
    };

  - |
    nand-controller@43100000 {
        compatible = "marvell,pxa3xx-nand-controller";
        reg = <0x43100000 90>;
        interrupts = <45>;
        clocks = <&clks 1>;
        clock-names = "core";
        dmas = <&pdma 97 3>;
        dma-names = "data";
        #address-cells = <1>;
        #size-cells = <0>;
        nand@0 {
            reg = <0>;
            nand-rb = <0>;
            nand-ecc-mode = "hw";
            marvell,nand-keep-config;
        };
    };

...